Commitments and Contingencies Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Reserve for Off-balance Sheet Activities \| Residential Mortgage
Loss Contingencies [Line Items]
Valuation allowances and reserves	$ 3.2	$ 2.1

Amount of valuation and qualifying accounts and reserves.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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